How much are you making off the 376? I looked into this before vice stroking and forging the stock LS3 to a 416ci. What made you go LSX?

Not sure what i'm making right now. Was planning on dyno this month, but funds are a little tight. So I'll find out soon.

If the LS3 block was salvagable I would've made it into a 427.

The lSX376 stuck out because it was already built and even though it has powdered rods, I figured the forged pistons should be more resilient to properly tuned boosted power when I add the Whipple later on.

Wow, that is amazing! I thought that engine was only supposed to be 450, at the flywheel? Did you change anything? Generous dyno? Or are these engines rated very conservatively?

I know that these engines are built for boost and that is where you are going, but that is a pretty strong motor. You could have lots of pop with probably no troubles for 100,000 miles and maybe 200k. Tempting thought, unless you are totally focused on boost.
I keep thinking about buying a used SS and dropping in an LSX454. Hopefully it would run strong and be mostly trouble free for a decade.

Wow, that is amazing! I thought that engine was only supposed to be 450, at the flywheel? Did you change anything? Generous dyno? Or are these engines rated very conservatively?

I know that these engines are built for boost and that is where you are going, but that is a pretty strong motor. You could have lots of pop with probably no troubles for 100,000 miles and maybe 200k. Tempting thought, unless you are totally focused on boost.
I keep thinking about buying a used SS and dropping in an LSX454. Hopefully it would run strong and be mostly trouble free for a decade.

Shane D

These are great engines.

I was told it was dyno'ed conservatively. So I guess that's why my numbers are so high.. I have the gen 2 lsx which is 10.7:1 compression

I was told it was dyno'ed conservatively. So I guess that's why my numbers are so high.. I have the gen 2 lsx which is 10.7:1 compression

Wow! Has your shop ever dynoed an LSX454? Supposedly that is about 580 at the flywheel (fuel injected). If that was really close on 550 at the wheels, I just wouldn't see the need, or the risk, of forced induction.